./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_543b0f5a-dfc8-4b32-844d-5574a3cf4fad/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_543b0f5a-dfc8-4b32-844d-5574a3cf4fad/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_543b0f5a-dfc8-4b32-844d-5574a3cf4fad/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_543b0f5a-dfc8-4b32-844d-5574a3cf4fad/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_543b0f5a-dfc8-4b32-844d-5574a3cf4fad/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_543b0f5a-dfc8-4b32-844d-5574a3cf4fad/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d5289904c0d34e84fc731c9bca51c5d8bc54117a73409b0419290d8896b60d2d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:13:25,119 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:13:25,216 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_543b0f5a-dfc8-4b32-844d-5574a3cf4fad/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 05:13:25,224 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:13:25,225 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:13:25,268 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:13:25,269 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:13:25,270 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:13:25,271 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:13:25,271 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:13:25,272 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:13:25,272 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:13:25,272 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:13:25,273 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:13:25,273 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:13:25,273 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:13:25,273 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 05:13:25,273 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:13:25,273 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:13:25,274 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:13:25,274 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:13:25,274 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 05:13:25,274 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:13:25,274 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 05:13:25,275 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:13:25,275 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 05:13:25,275 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:13:25,275 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:13:25,275 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:13:25,275 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:13:25,276 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:13:25,276 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:13:25,276 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:13:25,277 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:13:25,277 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:13:25,277 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:13:25,277 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:13:25,277 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:13:25,278 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:13:25,278 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:13:25,278 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 05:13:25,278 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 05:13:25,278 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:13:25,278 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:13:25,278 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:13:25,278 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:13:25,278 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:13:25,278 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:13:25,278 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_543b0f5a-dfc8-4b32-844d-5574a3cf4fad/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5289904c0d34e84fc731c9bca51c5d8bc54117a73409b0419290d8896b60d2d [2024-11-28 05:13:25,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:13:25,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:13:25,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:13:25,583 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:13:25,584 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:13:25,585 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_543b0f5a-dfc8-4b32-844d-5574a3cf4fad/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2024-11-28 05:13:28,664 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_543b0f5a-dfc8-4b32-844d-5574a3cf4fad/bin/uautomizer-verify-aQ6SnzHsRB/data/0119e1ccf/738e7761cb9b4f248bf48cf41df28cf9/FLAG04cb9785d [2024-11-28 05:13:29,189 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:13:29,190 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_543b0f5a-dfc8-4b32-844d-5574a3cf4fad/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2024-11-28 05:13:29,205 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_543b0f5a-dfc8-4b32-844d-5574a3cf4fad/bin/uautomizer-verify-aQ6SnzHsRB/data/0119e1ccf/738e7761cb9b4f248bf48cf41df28cf9/FLAG04cb9785d [2024-11-28 05:13:29,229 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_543b0f5a-dfc8-4b32-844d-5574a3cf4fad/bin/uautomizer-verify-aQ6SnzHsRB/data/0119e1ccf/738e7761cb9b4f248bf48cf41df28cf9 [2024-11-28 05:13:29,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:13:29,236 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:13:29,238 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:13:29,239 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:13:29,249 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:13:29,251 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:13:29" (1/1) ... [2024-11-28 05:13:29,255 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51039b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:13:29, skipping insertion in model container [2024-11-28 05:13:29,255 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:13:29" (1/1) ... [2024-11-28 05:13:29,305 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:13:29,712 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_543b0f5a-dfc8-4b32-844d-5574a3cf4fad/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30640,30653] [2024-11-28 05:13:29,722 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:13:29,739 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:13:29,808 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_543b0f5a-dfc8-4b32-844d-5574a3cf4fad/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30640,30653] [2024-11-28 05:13:29,815 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:13:29,868 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:13:29,869 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:13:29 WrapperNode [2024-11-28 05:13:29,869 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:13:29,870 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:13:29,870 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:13:29,870 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:13:29,882 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:13:29" (1/1) ... [2024-11-28 05:13:29,893 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:13:29" (1/1) ... [2024-11-28 05:13:29,919 INFO L138 Inliner]: procedures = 162, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 35 [2024-11-28 05:13:29,919 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:13:29,920 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:13:29,920 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:13:29,920 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:13:29,932 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:13:29" (1/1) ... [2024-11-28 05:13:29,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:13:29" (1/1) ... [2024-11-28 05:13:29,936 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:13:29" (1/1) ... [2024-11-28 05:13:29,966 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5]. The 0 writes are split as follows [0, 0]. [2024-11-28 05:13:29,968 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:13:29" (1/1) ... [2024-11-28 05:13:29,968 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:13:29" (1/1) ... [2024-11-28 05:13:29,980 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:13:29" (1/1) ... [2024-11-28 05:13:29,981 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:13:29" (1/1) ... [2024-11-28 05:13:29,989 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:13:29" (1/1) ... [2024-11-28 05:13:29,993 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:13:29" (1/1) ... [2024-11-28 05:13:29,994 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:13:29" (1/1) ... [2024-11-28 05:13:30,000 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:13:30,002 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:13:30,005 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:13:30,006 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:13:30,007 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:13:29" (1/1) ... [2024-11-28 05:13:30,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:13:30,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_543b0f5a-dfc8-4b32-844d-5574a3cf4fad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:30,046 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_543b0f5a-dfc8-4b32-844d-5574a3cf4fad/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:13:30,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_543b0f5a-dfc8-4b32-844d-5574a3cf4fad/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:13:30,081 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-11-28 05:13:30,082 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-11-28 05:13:30,082 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-28 05:13:30,082 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-28 05:13:30,082 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-28 05:13:30,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:13:30,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:13:30,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 05:13:30,083 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-28 05:13:30,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:13:30,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:13:30,084 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 05:13:30,278 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:13:30,280 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:13:30,465 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 05:13:30,465 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:13:30,614 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:13:30,614 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-28 05:13:30,615 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:13:30 BoogieIcfgContainer [2024-11-28 05:13:30,615 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:13:30,621 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:13:30,622 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:13:30,634 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:13:30,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:13:29" (1/3) ... [2024-11-28 05:13:30,635 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45312e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:13:30, skipping insertion in model container [2024-11-28 05:13:30,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:13:29" (2/3) ... [2024-11-28 05:13:30,635 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45312e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:13:30, skipping insertion in model container [2024-11-28 05:13:30,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:13:30" (3/3) ... [2024-11-28 05:13:30,637 INFO L128 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2024-11-28 05:13:30,659 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:13:30,661 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 31_simple_loop5_vs.i that has 3 procedures, 23 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-28 05:13:30,662 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 05:13:30,737 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-28 05:13:30,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 27 transitions, 62 flow [2024-11-28 05:13:30,823 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-11-28 05:13:30,826 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 05:13:30,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 28 events. 4/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 64 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-11-28 05:13:30,830 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 27 transitions, 62 flow [2024-11-28 05:13:30,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 26 transitions, 59 flow [2024-11-28 05:13:30,843 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:13:30,858 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@31e7a196, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:13:30,861 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-28 05:13:30,874 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 05:13:30,874 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-11-28 05:13:30,874 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 05:13:30,874 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:30,875 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:30,876 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 05:13:30,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:30,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1689188744, now seen corresponding path program 1 times [2024-11-28 05:13:30,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:30,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61399544] [2024-11-28 05:13:30,895 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:30,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:13:31,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:31,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61399544] [2024-11-28 05:13:31,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61399544] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:13:31,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:13:31,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:13:31,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693045161] [2024-11-28 05:13:31,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:13:31,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:13:31,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:31,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:13:31,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:13:31,338 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2024-11-28 05:13:31,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:31,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:13:31,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2024-11-28 05:13:31,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:13:31,548 INFO L124 PetriNetUnfolderBase]: 158/310 cut-off events. [2024-11-28 05:13:31,548 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 05:13:31,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581 conditions, 310 events. 158/310 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1275 event pairs, 50 based on Foata normal form. 9/309 useless extension candidates. Maximal degree in co-relation 571. Up to 134 conditions per place. [2024-11-28 05:13:31,558 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 18 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2024-11-28 05:13:31,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 105 flow [2024-11-28 05:13:31,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:13:31,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:13:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-11-28 05:13:31,584 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6790123456790124 [2024-11-28 05:13:31,586 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 59 flow. Second operand 3 states and 55 transitions. [2024-11-28 05:13:31,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 105 flow [2024-11-28 05:13:31,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 28 transitions, 104 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 05:13:31,601 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 68 flow [2024-11-28 05:13:31,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2024-11-28 05:13:31,610 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2024-11-28 05:13:31,610 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 68 flow [2024-11-28 05:13:31,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:31,610 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:31,611 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:31,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 05:13:31,611 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 05:13:31,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:31,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1166729962, now seen corresponding path program 1 times [2024-11-28 05:13:31,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:31,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954742780] [2024-11-28 05:13:31,613 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:31,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 05:13:31,667 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 05:13:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 05:13:31,712 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 05:13:31,712 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 05:13:31,715 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-28 05:13:31,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-11-28 05:13:31,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-11-28 05:13:31,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-28 05:13:31,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 05:13:31,718 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-28 05:13:31,723 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-28 05:13:31,723 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-28 05:13:31,760 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-28 05:13:31,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 47 transitions, 114 flow [2024-11-28 05:13:31,787 INFO L124 PetriNetUnfolderBase]: 5/38 cut-off events. [2024-11-28 05:13:31,787 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 05:13:31,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 38 events. 5/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 84 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 45. Up to 3 conditions per place. [2024-11-28 05:13:31,788 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 47 transitions, 114 flow [2024-11-28 05:13:31,788 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 33 transitions, 79 flow [2024-11-28 05:13:31,794 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:13:31,795 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@31e7a196, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:13:31,795 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-28 05:13:31,806 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 05:13:31,806 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-11-28 05:13:31,806 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 05:13:31,807 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:31,809 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:31,810 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-28 05:13:31,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:31,810 INFO L85 PathProgramCache]: Analyzing trace with hash -986086566, now seen corresponding path program 1 times [2024-11-28 05:13:31,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:31,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876547118] [2024-11-28 05:13:31,811 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:31,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:13:31,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:31,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876547118] [2024-11-28 05:13:31,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876547118] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:13:31,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:13:31,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:13:31,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376679451] [2024-11-28 05:13:31,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:13:31,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:13:31,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:31,896 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:13:31,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:13:31,903 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-11-28 05:13:31,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:31,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:13:31,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-11-28 05:13:31,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:13:32,384 INFO L124 PetriNetUnfolderBase]: 1203/1934 cut-off events. [2024-11-28 05:13:32,384 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2024-11-28 05:13:32,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3719 conditions, 1934 events. 1203/1934 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10041 event pairs, 303 based on Foata normal form. 54/1922 useless extension candidates. Maximal degree in co-relation 3708. Up to 1003 conditions per place. [2024-11-28 05:13:32,413 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 25 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2024-11-28 05:13:32,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 38 transitions, 152 flow [2024-11-28 05:13:32,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:13:32,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:13:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-11-28 05:13:32,416 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5886524822695035 [2024-11-28 05:13:32,416 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 79 flow. Second operand 3 states and 83 transitions. [2024-11-28 05:13:32,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 38 transitions, 152 flow [2024-11-28 05:13:32,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 151 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 05:13:32,419 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 94 flow [2024-11-28 05:13:32,420 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2024-11-28 05:13:32,420 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2024-11-28 05:13:32,421 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 94 flow [2024-11-28 05:13:32,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:32,421 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:32,422 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:32,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 05:13:32,422 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-28 05:13:32,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:32,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1613228836, now seen corresponding path program 1 times [2024-11-28 05:13:32,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:32,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740668325] [2024-11-28 05:13:32,423 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:32,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 05:13:32,467 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 05:13:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 05:13:32,493 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 05:13:32,493 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 05:13:32,494 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-28 05:13:32,494 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-11-28 05:13:32,494 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2024-11-28 05:13:32,494 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-28 05:13:32,494 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-28 05:13:32,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 05:13:32,494 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-28 05:13:32,499 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-28 05:13:32,499 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-28 05:13:32,549 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-28 05:13:32,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 67 transitions, 170 flow [2024-11-28 05:13:32,564 INFO L124 PetriNetUnfolderBase]: 6/48 cut-off events. [2024-11-28 05:13:32,564 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-28 05:13:32,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 48 events. 6/48 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 104 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 59. Up to 4 conditions per place. [2024-11-28 05:13:32,565 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 67 transitions, 170 flow [2024-11-28 05:13:32,568 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 40 transitions, 101 flow [2024-11-28 05:13:32,569 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:13:32,570 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@31e7a196, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:13:32,570 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-28 05:13:32,577 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 05:13:32,577 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-11-28 05:13:32,577 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 05:13:32,577 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:32,577 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:32,577 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-28 05:13:32,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:32,578 INFO L85 PathProgramCache]: Analyzing trace with hash 890340828, now seen corresponding path program 1 times [2024-11-28 05:13:32,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:32,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754643147] [2024-11-28 05:13:32,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:32,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:13:32,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:32,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754643147] [2024-11-28 05:13:32,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754643147] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:13:32,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:13:32,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:13:32,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783642573] [2024-11-28 05:13:32,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:13:32,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:13:32,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:32,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:13:32,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:13:32,682 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 67 [2024-11-28 05:13:32,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:32,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:13:32,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 67 [2024-11-28 05:13:32,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:13:34,135 INFO L124 PetriNetUnfolderBase]: 6995/10083 cut-off events. [2024-11-28 05:13:34,135 INFO L125 PetriNetUnfolderBase]: For 1030/1030 co-relation queries the response was YES. [2024-11-28 05:13:34,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19714 conditions, 10083 events. 6995/10083 cut-off events. For 1030/1030 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 57777 event pairs, 1712 based on Foata normal form. 243/10027 useless extension candidates. Maximal degree in co-relation 19702. Up to 5767 conditions per place. [2024-11-28 05:13:34,237 INFO L140 encePairwiseOnDemand]: 54/67 looper letters, 32 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2024-11-28 05:13:34,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 48 transitions, 203 flow [2024-11-28 05:13:34,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:13:34,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:13:34,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-11-28 05:13:34,240 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5522388059701493 [2024-11-28 05:13:34,241 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 101 flow. Second operand 3 states and 111 transitions. [2024-11-28 05:13:34,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 48 transitions, 203 flow [2024-11-28 05:13:34,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 48 transitions, 198 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-28 05:13:34,247 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 120 flow [2024-11-28 05:13:34,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2024-11-28 05:13:34,249 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2024-11-28 05:13:34,250 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 120 flow [2024-11-28 05:13:34,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:34,251 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:34,251 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:34,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 05:13:34,252 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-28 05:13:34,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:34,253 INFO L85 PathProgramCache]: Analyzing trace with hash 186859072, now seen corresponding path program 1 times [2024-11-28 05:13:34,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:34,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296791931] [2024-11-28 05:13:34,254 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:34,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:13:34,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:34,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296791931] [2024-11-28 05:13:34,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296791931] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:13:34,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:13:34,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:13:34,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174289290] [2024-11-28 05:13:34,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:13:34,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:13:34,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:34,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:13:34,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:13:34,426 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 67 [2024-11-28 05:13:34,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:34,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:13:34,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 67 [2024-11-28 05:13:34,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:13:36,081 INFO L124 PetriNetUnfolderBase]: 9157/13304 cut-off events. [2024-11-28 05:13:36,081 INFO L125 PetriNetUnfolderBase]: For 4334/4334 co-relation queries the response was YES. [2024-11-28 05:13:36,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29932 conditions, 13304 events. 9157/13304 cut-off events. For 4334/4334 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 80790 event pairs, 1070 based on Foata normal form. 135/13365 useless extension candidates. Maximal degree in co-relation 29917. Up to 6256 conditions per place. [2024-11-28 05:13:36,189 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 43 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-11-28 05:13:36,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 65 transitions, 330 flow [2024-11-28 05:13:36,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:13:36,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:13:36,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-11-28 05:13:36,192 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48880597014925375 [2024-11-28 05:13:36,192 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 120 flow. Second operand 4 states and 131 transitions. [2024-11-28 05:13:36,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 65 transitions, 330 flow [2024-11-28 05:13:36,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 65 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:13:36,208 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 188 flow [2024-11-28 05:13:36,208 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2024-11-28 05:13:36,209 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-11-28 05:13:36,209 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 188 flow [2024-11-28 05:13:36,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:36,210 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:36,210 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:36,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 05:13:36,211 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-28 05:13:36,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:36,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1813415845, now seen corresponding path program 1 times [2024-11-28 05:13:36,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:36,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546771167] [2024-11-28 05:13:36,212 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:36,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 05:13:36,241 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 05:13:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 05:13:36,270 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 05:13:36,274 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 05:13:36,275 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-11-28 05:13:36,275 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-11-28 05:13:36,275 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-11-28 05:13:36,275 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-28 05:13:36,275 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-28 05:13:36,275 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-28 05:13:36,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 05:13:36,276 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-28 05:13:36,276 WARN L246 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-28 05:13:36,276 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-28 05:13:36,333 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-28 05:13:36,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 87 transitions, 230 flow [2024-11-28 05:13:36,346 INFO L124 PetriNetUnfolderBase]: 7/58 cut-off events. [2024-11-28 05:13:36,346 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-28 05:13:36,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 58 events. 7/58 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 74. Up to 5 conditions per place. [2024-11-28 05:13:36,348 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 87 transitions, 230 flow [2024-11-28 05:13:36,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 47 transitions, 125 flow [2024-11-28 05:13:36,349 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:13:36,351 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@31e7a196, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:13:36,351 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-28 05:13:36,355 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 05:13:36,356 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2024-11-28 05:13:36,356 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 05:13:36,356 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:36,356 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:36,356 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-28 05:13:36,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:36,356 INFO L85 PathProgramCache]: Analyzing trace with hash -354873858, now seen corresponding path program 1 times [2024-11-28 05:13:36,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:36,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208339380] [2024-11-28 05:13:36,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:36,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:13:36,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:36,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208339380] [2024-11-28 05:13:36,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208339380] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:13:36,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:13:36,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:13:36,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10534137] [2024-11-28 05:13:36,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:13:36,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:13:36,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:36,446 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:13:36,446 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:13:36,460 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 87 [2024-11-28 05:13:36,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:36,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:13:36,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 87 [2024-11-28 05:13:36,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:13:41,503 INFO L124 PetriNetUnfolderBase]: 36336/48833 cut-off events. [2024-11-28 05:13:41,504 INFO L125 PetriNetUnfolderBase]: For 7732/7732 co-relation queries the response was YES. [2024-11-28 05:13:41,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96558 conditions, 48833 events. 36336/48833 cut-off events. For 7732/7732 co-relation queries the response was YES. Maximal size of possible extension queue 1800. Compared 292635 event pairs, 9261 based on Foata normal form. 1008/48581 useless extension candidates. Maximal degree in co-relation 96545. Up to 29392 conditions per place. [2024-11-28 05:13:41,988 INFO L140 encePairwiseOnDemand]: 72/87 looper letters, 39 selfloop transitions, 6 changer transitions 0/58 dead transitions. [2024-11-28 05:13:41,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 258 flow [2024-11-28 05:13:41,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:13:41,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:13:41,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2024-11-28 05:13:41,993 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5325670498084292 [2024-11-28 05:13:41,993 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 125 flow. Second operand 3 states and 139 transitions. [2024-11-28 05:13:41,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 258 flow [2024-11-28 05:13:42,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 245 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-28 05:13:42,006 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 146 flow [2024-11-28 05:13:42,006 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-11-28 05:13:42,007 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2024-11-28 05:13:42,007 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 146 flow [2024-11-28 05:13:42,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:42,007 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:42,007 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:42,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 05:13:42,010 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-28 05:13:42,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:42,011 INFO L85 PathProgramCache]: Analyzing trace with hash 397121410, now seen corresponding path program 1 times [2024-11-28 05:13:42,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:42,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523165941] [2024-11-28 05:13:42,011 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:42,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:13:42,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:42,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523165941] [2024-11-28 05:13:42,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523165941] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:13:42,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:13:42,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:13:42,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584759451] [2024-11-28 05:13:42,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:13:42,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:13:42,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:42,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:13:42,130 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:13:42,147 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 87 [2024-11-28 05:13:42,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:42,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:13:42,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 87 [2024-11-28 05:13:42,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:13:46,051 INFO L124 PetriNetUnfolderBase]: 43697/59530 cut-off events. [2024-11-28 05:13:46,051 INFO L125 PetriNetUnfolderBase]: For 19236/19236 co-relation queries the response was YES. [2024-11-28 05:13:46,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134273 conditions, 59530 events. 43697/59530 cut-off events. For 19236/19236 co-relation queries the response was YES. Maximal size of possible extension queue 2373. Compared 378182 event pairs, 5040 based on Foata normal form. 372/59698 useless extension candidates. Maximal degree in co-relation 134257. Up to 31321 conditions per place. [2024-11-28 05:13:46,710 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 52 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-11-28 05:13:46,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 79 transitions, 410 flow [2024-11-28 05:13:46,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:13:46,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:13:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 166 transitions. [2024-11-28 05:13:46,713 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47701149425287354 [2024-11-28 05:13:46,713 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 146 flow. Second operand 4 states and 166 transitions. [2024-11-28 05:13:46,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 79 transitions, 410 flow [2024-11-28 05:13:46,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 79 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:13:46,746 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 233 flow [2024-11-28 05:13:46,747 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=233, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2024-11-28 05:13:46,747 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2024-11-28 05:13:46,748 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 233 flow [2024-11-28 05:13:46,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:46,748 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:46,748 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:46,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 05:13:46,749 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-28 05:13:46,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:46,749 INFO L85 PathProgramCache]: Analyzing trace with hash -391264803, now seen corresponding path program 1 times [2024-11-28 05:13:46,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:46,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113361231] [2024-11-28 05:13:46,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:46,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:46,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:13:46,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:46,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113361231] [2024-11-28 05:13:46,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113361231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:13:46,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:13:46,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:13:46,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400985009] [2024-11-28 05:13:46,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:13:46,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:13:46,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:46,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:13:46,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:13:46,857 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 87 [2024-11-28 05:13:46,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 233 flow. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:46,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:13:46,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 87 [2024-11-28 05:13:46,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:13:47,417 INFO L124 PetriNetUnfolderBase]: 1988/4139 cut-off events. [2024-11-28 05:13:47,418 INFO L125 PetriNetUnfolderBase]: For 2683/2683 co-relation queries the response was YES. [2024-11-28 05:13:47,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10466 conditions, 4139 events. 1988/4139 cut-off events. For 2683/2683 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 30625 event pairs, 261 based on Foata normal form. 3216/7272 useless extension candidates. Maximal degree in co-relation 10448. Up to 2700 conditions per place. [2024-11-28 05:13:47,443 INFO L140 encePairwiseOnDemand]: 77/87 looper letters, 32 selfloop transitions, 10 changer transitions 0/59 dead transitions. [2024-11-28 05:13:47,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 349 flow [2024-11-28 05:13:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:13:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:13:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2024-11-28 05:13:47,445 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.524904214559387 [2024-11-28 05:13:47,445 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 233 flow. Second operand 3 states and 137 transitions. [2024-11-28 05:13:47,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 349 flow [2024-11-28 05:13:47,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 349 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-28 05:13:47,451 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 253 flow [2024-11-28 05:13:47,451 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=253, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-11-28 05:13:47,451 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-11-28 05:13:47,451 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 253 flow [2024-11-28 05:13:47,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:47,452 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:47,452 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:47,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 05:13:47,452 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-28 05:13:47,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:47,453 INFO L85 PathProgramCache]: Analyzing trace with hash 64995475, now seen corresponding path program 1 times [2024-11-28 05:13:47,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:47,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973619459] [2024-11-28 05:13:47,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:47,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 05:13:47,472 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 05:13:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 05:13:47,489 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 05:13:47,489 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 05:13:47,489 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-28 05:13:47,490 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-11-28 05:13:47,490 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2024-11-28 05:13:47,490 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-11-28 05:13:47,490 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-11-28 05:13:47,490 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-11-28 05:13:47,490 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-11-28 05:13:47,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 05:13:47,491 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-28 05:13:47,492 WARN L246 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-28 05:13:47,492 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-11-28 05:13:47,552 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-28 05:13:47,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 107 transitions, 294 flow [2024-11-28 05:13:47,567 INFO L124 PetriNetUnfolderBase]: 8/68 cut-off events. [2024-11-28 05:13:47,567 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-28 05:13:47,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 68 events. 8/68 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 148 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 90. Up to 6 conditions per place. [2024-11-28 05:13:47,568 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 107 transitions, 294 flow [2024-11-28 05:13:47,569 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 54 transitions, 151 flow [2024-11-28 05:13:47,571 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:13:47,572 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@31e7a196, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:13:47,572 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-28 05:13:47,576 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 05:13:47,576 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2024-11-28 05:13:47,576 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 05:13:47,576 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:47,576 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:47,576 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-28 05:13:47,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:47,577 INFO L85 PathProgramCache]: Analyzing trace with hash -472569968, now seen corresponding path program 1 times [2024-11-28 05:13:47,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:47,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606095801] [2024-11-28 05:13:47,577 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:47,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:13:47,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:47,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606095801] [2024-11-28 05:13:47,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606095801] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:13:47,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:13:47,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:13:47,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924006360] [2024-11-28 05:13:47,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:13:47,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:13:47,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:47,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:13:47,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:13:47,660 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 107 [2024-11-28 05:13:47,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:47,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:13:47,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 107 [2024-11-28 05:13:47,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:14:04,876 INFO L124 PetriNetUnfolderBase]: 178118/228120 cut-off events. [2024-11-28 05:14:04,876 INFO L125 PetriNetUnfolderBase]: For 49465/49465 co-relation queries the response was YES. [2024-11-28 05:14:05,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454639 conditions, 228120 events. 178118/228120 cut-off events. For 49465/49465 co-relation queries the response was YES. Maximal size of possible extension queue 6695. Compared 1409612 event pairs, 48026 based on Foata normal form. 4077/227067 useless extension candidates. Maximal degree in co-relation 454625. Up to 141658 conditions per place. [2024-11-28 05:14:06,682 INFO L140 encePairwiseOnDemand]: 90/107 looper letters, 46 selfloop transitions, 7 changer transitions 0/68 dead transitions. [2024-11-28 05:14:06,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 68 transitions, 317 flow [2024-11-28 05:14:06,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:14:06,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:14:06,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2024-11-28 05:14:06,684 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5202492211838006 [2024-11-28 05:14:06,685 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 151 flow. Second operand 3 states and 167 transitions. [2024-11-28 05:14:06,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 68 transitions, 317 flow [2024-11-28 05:14:06,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 68 transitions, 292 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-11-28 05:14:06,738 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 172 flow [2024-11-28 05:14:06,740 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-11-28 05:14:06,740 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2024-11-28 05:14:06,744 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 172 flow [2024-11-28 05:14:06,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:14:06,745 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:14:06,745 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:14:06,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 05:14:06,745 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-28 05:14:06,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:14:06,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1334389568, now seen corresponding path program 1 times [2024-11-28 05:14:06,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:14:06,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747956071] [2024-11-28 05:14:06,746 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:14:06,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:14:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:14:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:14:06,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:14:06,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747956071] [2024-11-28 05:14:06,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747956071] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:14:06,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:14:06,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:14:06,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168994167] [2024-11-28 05:14:06,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:14:06,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:14:06,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:14:06,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:14:06,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:14:06,875 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 107 [2024-11-28 05:14:06,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:14:06,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:14:06,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 107 [2024-11-28 05:14:06,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand